Abstract

ARCOS CASARRUBIAS, José Antonio; OLAYO, Roberto  and  NORIEGA BERNECHEA, Jaime. La cinética de reacción y su influencia en la distribución de pesos moleculares, en un sistema de polimerización en emulsión sembrado. Rev. Soc. Quím. Méx [online]. 2003, vol.47, n.3, pp.230-239. ISSN 0583-7693.

Based on a deterministic model of emulsion polymerization kinetics during stage II, we have shown that the polymer chain length distribution P(N), is more sensible than the molecular weight distribution W(M) to obtain information about the mechanism that stops chain growth. The semilogarithmic plot of P(N) against N, the extent of polymerization, permits the evaluation of the relationship among the kinetic coefficients involved in the determination of W(M). Approximate analytical solutions of the differences and differential equations systems were obtained by the Z transform; this approach can be applicable to all three emulsion polymerization stages.

Keywords : Emulsion polymerization; molecular weight distribution; reaction kinetics.

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